Reminder: check here for official word on any known issues to Dreamhost's team. These forums are hosted there.

Some of the dreamhost servers seem to be flakey. In the last hour or two, there's about a 50% chance of things failing with the message below. Hitting refresh a few times tends to fix this. Dreamhost support has been pinged.

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, webmaster@phpbb1.dreamhost.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

UPDATE Dreamhost says they've rebooted a server, and there should be no further issues.

Note: today's intermittent downtime of this site is Dreamhost's fault -- see here for details. Note especially this paragraph:

Update Sept. 28th, 12:04pm PST: This issues with the easy mode one-click are almost resolved. All of the machine are back online. The software installs are functional as well. You should be able to resume access to your easy mode software installs.

However, there is one caveat. We had to disable the registration feature on Drupal and PhpBB. Since this appeared to be the source of the exploit. Therefor new users cannot register on your sites. Our admins are still working on a more practical solution. Again we sincerely apologize for any inconvenience this has caused. Your continued patience is greatly appreciated. Please check back for updates.-Brian S

So, if you are having issues creating an account, please reload the above link to see if Dreamhost has fixed things on their end.